querying heterogeneous datasets on the linked data web: challenges, approaches, and trends
DESCRIPTION
The growing number of datasets published on the Web as linked data brings both opportunities for high data availability and challenges inherent to querying data in a semantically heterogeneous and distributed environment. Approaches used for querying siloed databases fail at Web-scale because users don't have an a priori understanding of all the available datasets. This article investigates the main challenges in constructing a query and search solution for linked data and analyzes existing approaches and trends.Full article: http://ieeexplore.ieee.org/xpls/abs_all.jsp?arnumber=6051410&tag=1TRANSCRIPT
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Querying Heterogeneous Datasets on the Linked Data Web:
Challenges, Approaches, and Trends
André Freitas, Edward Curry, João G. Oliveira,
Seán O’Riain
Digital Enterprise Research Institute www.deri.ie
IEEE Internet Computing
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http://ieeexplore.ieee.org/xpls/abs_all.jsp?arnumber=6051410&tag=1
Digital Enterprise Research Institute www.deri.ie
Challenges
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Current Scenario/Ideal Scenario
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Expressivity- usability trade- off
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Challenges
This analysis focuses on the investigation of existing approaches under the perspective of the usability-expressivity trade-off.
This focus guides the categorization and analysis of existing challenges, approaches and trends.
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Challenge Dimensions
Query expressivity Usability Vocabulary-level semantic matching Entity Reconciliation Semantic Tractability mechanisms
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Approaches
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Approaches
Information Retrieval approaches Entity-centric search Structure search
Natural Language approaches Question Answering Semantic best-effort natural language interfaces
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Entity- Centric Search
e.g. Sindice
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Structure Search
e.g. Semplore
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Question Answering
e.g. FreyA
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Semantic Best- Effort/NL
e.g. Treo
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Comparative Analysis (Approaches)
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Trends
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Addressing the Challenges
The functionality analysis of existing approaches provides insights on how the major challenges should be addressed.
This set of strategic functionalities define the set of trends.
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Linked Data Web
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Trends
Complementary Search and Query Services User Interaction and Feedback Mechanisms Semantic Best-Effort Query Model Natural Language Processing Techniques Distributional Semantic Model External Knowledge Sources for Semantic
Enrichment Integrated Entity Reconciliation Techniques
Digital Enterprise Research Institute www.deri.ie
IEEE Internet Computing
Digital Enterprise Research Institute www.deri.ie
http://ieeexplore.ieee.org/xpls/abs_all.jsp?arnumber=6051410&tag=1
Digital Enterprise Research Institute www.deri.ie
http://andrefreitas.org